(1980). Subject Headings Guide: Adapted from Sears List of Subject Headings and the Canadian Companion to Sears. School Library Guide. SL-37-80.
Chicago-Zitierstil (17. Ausg.)Subject Headings Guide: Adapted from Sears List of Subject Headings and the Canadian Companion to Sears. School Library Guide. SL-37-80. 1980.
MLA-Zitierstil (9. Ausg.)Subject Headings Guide: Adapted from Sears List of Subject Headings and the Canadian Companion to Sears. School Library Guide. SL-37-80. 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.