Παραπομπή APA

Arora, R. (1999). Air pollution: Causes and effective control. Mangal Deep.

Παραπομπή Chicago Style

Arora, R.K. Air Pollution: Causes and Effective Control. Jaipur: Mangal Deep, 1999.

Παραπομπή MLA

Arora, R.K. Air Pollution: Causes and Effective Control. Mangal Deep, 1999.