APA (7th ed.) Citation

Osman Ayub. (1988). Etika kerja & profesionalisme Islam. Frontier Enterprise.

Chicago Style (17th ed.) Citation

Osman Ayub. Etika Kerja & Profesionalisme Islam. Kuala Lumpur: Frontier Enterprise, 1988.

MLA (9th ed.) Citation

Osman Ayub. Etika Kerja & Profesionalisme Islam. Frontier Enterprise, 1988.

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