Wynar, Bohdan S.
Libraries Unlimited, Inc., 1967
Buku Teks
Chan, Lois Mai
McGraw-Hill, 1994
Buku Teks
Joudrey, Daniel N.
Libraries Unlimited, 2015
Buku Teks
Taylor, Arlene G.
Libraries Unlimited, 1992
Buku Teks
Taylor, Arlene G.
Libraries Unlimited, 2006
Buku Teks