Gaya APA
Calwell, S., Johnson, D. (2006).
There's More to Life Than Sex & Money Inspirasi Hidup Sukses dan Bahagia .
Yogyakarta:
Baca.
Gaya MLA
Calwell, Sue., Johnson, Daniel.
"There's More to Life Than Sex & Money Inspirasi Hidup Sukses dan Bahagia".
Yogyakarta:
Baca,
2006.
Buku PSI.