Gaya APA
Cullen, R. (2012).
The Laarner Centered Curriculum Desigen and Implementation (1st edition).
San Fransisco:
Jossey Bass.
Gaya MLA
Cullen, Roxanne.
"The Laarner Centered Curriculum Desigen and Implementation".
1st edition
San Fransisco:
Jossey Bass,
2012.
Text.