Gaya APA
Tarigan, J., Yenawan, S.
(2013).
Business and Personal Development
.
Yogyakarta:
Andi Yogyakarta.
Gaya MLA
Tarigan, Josua., Yenawan, Swenjiadi.
"Business and Personal Development".
Yogyakarta:
Andi Yogyakarta,
2013.
Text.