Gaya APA
E-learning and the science of instruction. (2003).
San francisco:
John Willey & Sons.
Gaya Chicago
E-learning and the science of instruction.
.
San francisco:
John Willey & Sons,
2003.
Buku.
Gaya MLA
E-learning and the science of instruction.
.
San francisco:
John Willey & Sons,
2003.
Buku.
Gaya Turabian
E-learning and the science of instruction.
San francisco:
John Willey & Sons,
2003.
Buku.