APA (7th ed.) Citation

Johan Arif. (2013). Alam sekeliling. Penapro Sdn. Bhd.

Chicago Style (17th ed.) Citation

Johan Arif. Alam Sekeliling. Selangor: Penapro Sdn. Bhd, 2013.

MLA (8th ed.) Citation

Johan Arif. Alam Sekeliling. Penapro Sdn. Bhd, 2013.

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