Gaya APA

Heelan, J, S., Ingersoll, F, W. (2001). Essentials of Human Parasitology 1st Edition . New York: Delmar Cengage Learning.

Gaya MLA

Heelan, Judith, S.., Ingersoll, Frances, W.. "Essentials of Human Parasitology 1st Edition". New York: Delmar Cengage Learning, 2001. Text.