Gaya APA
Principles of Instructional Design
.
(2005).
Belmont:
New York. Holt, Rineharrt and Wiston. Second Edition.
Gaya MLA
Principles of Instructional Design
.
Fifth.
Belmont:
New York. Holt, Rineharrt and Wiston. Second Edition,
2005.
Buku.