Gaya APA
Gerlach, V, S. et al (1980).
Teaching and media : a systematic approach (2nd ed).
Englewood Cliffs, NJ:
Prentice Hall.
Gaya MLA
Gerlach, Vernon, S.. et al.
"Teaching and media : a systematic approach".
2nd ed
Englewood Cliffs, NJ:
Prentice Hall,
1980.
Text.