APA

Comer D. E., . (1997). Internet book. : Pearson Education Asia.

Chicago

Comer Douglas E, . 1997. Internet book. : Pearson Education Asia.

Harvard

Comer D. E., . (1997). Internet book. : Pearson Education Asia.

MLA

Comer Douglas E, . Internet book. : Pearson Education Asia. 1997.