APA (7th ed.) Citation

Mukarto. (2007). English On Sky 1. Erlangga.

Chicago Style (17th ed.) Citation

Mukarto. English On Sky 1. Erlangga, 2007.

MLA (8th ed.) Citation

Mukarto. English On Sky 1. Erlangga, 2007.

Warning: These citations may not always be 100% accurate.