Blake, Robert R.
Gulf Pub. Co., Book Division, 1978
Buku Teks
Blake, Robert R.
Tex Gulf , 1968
Buku Teks
Blake, Robert R.
Gulf, 1974
Buku Teks
Adhitya Ahmad Pradypta
2015
UI - Tugas Akhir
Christine Handayani
Fakultas Psikologi Universitas Indonesia, 2009
UI - Tesis (Open)