APA (7th ed.) Citation

O'Callaghan Karen. (1987). Alam Semulajadi 1. Vinpress Sdn.Bhd..

Chicago Style (17th ed.) Citation

O'Callaghan Karen. Alam Semulajadi 1. England: Vinpress Sdn.Bhd., 1987.

MLA (9th ed.) Citation

O'Callaghan Karen. Alam Semulajadi 1. Vinpress Sdn.Bhd., 1987.

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