Garn, Stanley M.
Charles C. Thomas, 1971
Buku Teks
Kennedy, Raymond
[publisher not identified], [date of publication not identified]
Buku Teks
Coon, Carleton S.
Alfred A. Knoff, 1969
Buku Teks
Count, Earl Wendel
Henry Schuman, 1950
Buku Teks
Klass, Morton
J.B. Lippincott, 1971.
Buku Teks