Gaya APA
azzam, U, A. et al
(1981).
Research in education 4th Edition
(
Ed. 5)
.
Englewood Cliffs:
prentice hall inc..
Gaya MLA
azzam, Ummu, Abdillah. et al.
"Research in education 4th Edition".
Ed. 5
Englewood Cliffs:
prentice hall inc.,
1981.
Text.