Gaya APA

30 Ways to Improve Your Grades. (1976). Indonesia: Elex Media Komputindo.

Gaya Chicago

30 Ways to Improve Your Grades. 1st edition. Indonesia: Elex Media Komputindo, 1976. Text.

Gaya MLA

30 Ways to Improve Your Grades. 1st edition. Indonesia: Elex Media Komputindo, 1976. Text.

Gaya Turabian

30 Ways to Improve Your Grades. Indonesia: Elex Media Komputindo, 1976. Print.