Cita APA (7a ed.)

Wolff, H. (1990). A bibliography of occupational health and safety in the Philippines (1949-1989).

Cita Chicago Style (17a ed.)

Wolff, Hans-Juergen. A Bibliography of Occupational Health and Safety in the Philippines (1949-1989). Manila : Edith Flores Wolff & Hans-Juergen Wolff, 1990.

Cita MLA (9a ed.)

Wolff, Hans-Juergen. A Bibliography of Occupational Health and Safety in the Philippines (1949-1989). 1990.