Sinek, Simon
Penguin, 2017
Buku Teks
Shin, Kyung-sook
Gramedia Pustaka Utama, 2015
Buku Teks SO
planned and supervised by Dan Golenpaul Associates
McGraw-Hill, 1960
Buku Referensi
planned and supervised by Dan Golenpaul Associates
Simon and Schuster, 1967
Buku Referensi
planned and supervised by Dan Golenpaul Associates
Simon and Schuster, 1968
Buku Referensi