Fitzgerald, Suzanne Sparks
McGraw-Hill, 2011
Buku Teks
editors, Junaidi, Elda N. Auliansani, Farah S. Azizah, M. Umar Sadikin
UI Publishing, 2020
Buku Teks
Lauchman, Richard, author
American Management Association;;, 1993
eBooks
Mundhenk, Robert T., author
Houghton Mifflin, 1978
Buku Teks
Langan, John, 1942-, author
McGraw-Hill , 2001
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