Gaya APA

Ritchie, A, C., Boyd, W. (1990). Boyd,s Textbook of Pathology. Vol.2 (9th ed). Philadelphia: Lea \r Febiger.

Gaya MLA

Ritchie, A., C., Boyd, William. "Boyd,s Textbook of Pathology. Vol.2". 9th ed Philadelphia: Lea \r Febiger, 1990. print.