APA ציטוט

Wolff, H. (1989). Philippine directory of occupational health and safety. Edith T. Flores and H.J. Wolff.

Chicago Style (17th ed.) Citation

Wolff, Hans-Juergen. Philippine Directory of Occupational Health and Safety. Manila: Edith T. Flores and H.J. Wolff, 1989.

ציטוט MLA

Wolff, Hans-Juergen. Philippine Directory of Occupational Health and Safety. Edith T. Flores and H.J. Wolff, 1989.