Cole, Brent
How to win friends and influence people in the digital age
Simon & Schuster, 2011
 Buku Teks
Carnegie, Dale, 1888-1955
How to win friends & influence people in the digital age
Gramedia Pustaka Utama, 2019
 Buku Teks SO
Johnson, David W., 1940-
Reaching out: interpersonal effectiveness and self-actualization
Prentice Hall Internasional, 1990
 Buku Teks
Heskell, Peta
Menjadi pribadi gaul : kiat sukses menjalin hubngan pertemanan, asmara dan profesionalisme = Flirt coach : How to flirt for riendship, love and professional success / Peta Heskell ; penerjemah, Bagaskara PJ ; penyunting, Rahajeng Desy N.R
Torrent, 2004
 Buku Teks
Peck, M. Scott (Morgan Scott), 1936-2005
The road less travelled : a new psychology of love, traditional values and spiritual growth
Rider, 2008
 Buku Teks SO