Gaya APA
Tuckman, B, W.
(1999).
Conducting Educational Research
(
ed. 5)
.
Orlando:
Harcourr Brace & Company.
Gaya MLA
Tuckman, Bruce, W..
"Conducting Educational Research".
ed. 5
Orlando:
Harcourr Brace & Company,
1999.
Buku PPS Pend. Biologi.