Gaya APA

Palloff, R, M., Pratt, K. (2007). Building Online Learning Communities : Effective Strategies For The Virtual Classroom . Amerika: Jossey-Bass.

Gaya MLA

Palloff, Rena, M., Pratt, Keith. "Building Online Learning Communities : Effective Strategies For The Virtual Classroom". Amerika: Jossey-Bass, 2007. Text.