Howard, P. B. (1991). A content analysis of newspaper portrayal of abortion topics, January 1, 1986 to December 31, 1986. UMI Dissertation Information Services.
Chicago-referens (17:e uppl.)Howard, Perla Buhay. A Content Analysis of Newspaper Portrayal of Abortion Topics, January 1, 1986 to December 31, 1986. Ann Arbor, MI: UMI Dissertation Information Services, 1991.
MLA-referens (9:e uppl.)Howard, Perla Buhay. A Content Analysis of Newspaper Portrayal of Abortion Topics, January 1, 1986 to December 31, 1986. UMI Dissertation Information Services, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.