what is not required for a valid bibliography

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what is not required for a valid bibliography	1.36	0.1	6127	96	45
what	0.64	0.1	5807	66	4
is	1.84	1	8884	12	2
not	0.5	0.4	1189	9	3
required	0.01	0.4	1917	99	8
for	1.81	0.3	8100	84	3
a	1.87	0.9	2908	38	1
valid	1.13	0.8	7961	20	5
bibliography	0.43	0.6	3730	9	12

Keyword	CPC	PCC	Volume	Score
what is not required for a valid bibliography	1.34	1	6206	25
is it mandatory to include a bibliography	1.91	0.5	8283	7
what is needed for a bibliography	0.74	0.7	6704	66
does a bibliography include works not cited	0.39	0.4	9436	61
what needs to be in a bibliography	0.56	0.1	7786	54
do i need to add a bibliography	1.3	1	9292	37
should a bibliography be numbered	1.88	0.4	8295	77
does a bibliography need to be alphabetical	0.31	0.1	5589	6
does a bibliography need its own page	0.41	0.2	9605	66
bibliography not compatible with author-year	0.6	0.8	5829	42
does a bibliography include references	1.25	0.4	1212	70
does a bibliography go before references	0.8	0.9	8368	100
how to include a bibliography	0.47	0.5	6538	80
guidelines for preparing bibliography	1.43	0.6	3500	67
how to correctly do a bibliography	1.66	0.3	2936	75
can you do bibliography on articles	0.7	1	1531	57
which bibliography format should i use	0.04	0.3	1353	83
can you add bibliography without citation	1.37	0.9	2158	45
should bibliography be justified	0.48	0.8	7140	12
does bibliography include reference list	0.23	0.3	7141	3
bibliography with no author	0.73	0.2	8072	37
how should bibliography be written	1.69	0.7	7391	24