APA (7th ed.) Citation

Mukarto. (2007). English On Sky 13. Erlangga.

Chicago Style (17th ed.) Citation

Mukarto. English On Sky 13. Erlangga, 2007.

MLA (8th ed.) Citation

Mukarto. English On Sky 13. Erlangga, 2007.

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