Gaya APA
Popham, W, J., Baker, E, L.
(1970).
Systematic instruction
.
Englewood Cliffs, NJ:
Prentice Hall.
Gaya MLA
Popham, W., James., Baker, Eva, L..
"Systematic instruction".
Englewood Cliffs, NJ:
Prentice Hall,
1970.
Text.