Gaya APA

Studenmund, A. et al (1990). Course book to accompany economics private and public choice (5). United States of America: Harcourt Brace Jovanovich, Publisher.

Gaya MLA

Studenmund, A.H. et al. "Course book to accompany economics private and public choice". 5 United States of America: Harcourt Brace Jovanovich, Publisher, 1990. Text.