Gaya APA

Saunders, Phillip, Walstad, William B. (1990). The principles of economics course : a handbook for instructors . New York: Mc. Graw-Hill publishing company.

Gaya Chicago

Saunders, Phillip, Walstad, William B. The principles of economics course : a handbook for instructors. New York: Mc. Graw-Hill publishing company, 1990. Text.

Gaya MLA

Saunders, Phillip, Walstad, William B. The principles of economics course : a handbook for instructors. New York: Mc. Graw-Hill publishing company, 1990. Text.

Gaya Turabian

Saunders, Phillip, Walstad, William B. The principles of economics course : a handbook for instructors. New York: Mc. Graw-Hill publishing company, 1990. Print.