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