Ball, Miriam Ogden
Subject headings for the information file
Wilson, 1956
 Buku Teks
Sears, Minnie Earl
Sears list of subject headings
H. W. Wilson Co, 1977
 Buku Teks
Sears list of subject headings
edited by Barbara A. Bristow, Christi Showman Farrar
H.W. Wilson, a division of EBSCO Information Services ; Amenia, NY : Grey House Publishing, 2014
 Buku Referensi
Library of Congress subject headings : 20th edition, volume III, K-P
Library of Congress, Cataloging Distribution Service, 1997
 Buku Referensi
Library of Congress subject headings : 20th edition, volume I, A-C
Library of Congress, Cataloging Distribution Service, 1997
 Buku Referensi