Gaya APA

20 Steps to Better Writing. (1975). Indonesia: Elex Media Komputindo.

Gaya Chicago

20 Steps to Better Writing. 1st edition. Indonesia: Elex Media Komputindo, 1975. Text.

Gaya MLA

20 Steps to Better Writing. 1st edition. Indonesia: Elex Media Komputindo, 1975. Text.

Gaya Turabian

20 Steps to Better Writing. Indonesia: Elex Media Komputindo, 1975. Print.