Citazione Stile APA (7a Edizione)

Villegas, B. M. (1983). Strategies for crisis. Center for Research and Communication.

Citazione stile Chigago Style (17a edizione)

Villegas, Bernardo M. Strategies for Crisis. [Pasig, Metro Manila]: Center for Research and Communication, 1983.

Citatione MLA (9a ed.)

Villegas, Bernardo M. Strategies for Crisis. Center for Research and Communication, 1983.