APA Style

S., C, P. et al (2006). The Practice of Problem Based Learning (A Guide to Implementing PBL In the college classroom) . Bolton: Anker Publishing Company,INC.

MLA Style

S., C.B., Peter. et al. "The Practice of Problem Based Learning (A Guide to Implementing PBL In the college classroom)". Bolton: Anker Publishing Company,INC, 2006. Buku PGSD.