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Buku Teks
Downey, Jake
Sterling Pub, 1982
Buku Teks
Dyah Yasmina, author
Fakultas Psikologi Universitas Indonesia, 2004
UI - Tesis (Membership)
Pool, John Charles
Massachussetts cAddsion-Wesley 21 cm., 1985
Buku Teks
Alexander, Ralph
Richard D. Irwin , 1961
Buku Teks