APA
(1990). List Of Journals Indexed In Index Medicus. USa: US Department Of Health And Human Services.
Chicago
1990. List Of Journals Indexed In Index Medicus. USa: US Department Of Health And Human Services.
Harvard
(1990). List Of Journals Indexed In Index Medicus. USa: US Department Of Health And Human Services.
MLA
List Of Journals Indexed In Index Medicus. USa: US Department Of Health And Human Services. 1990.