Citazione Stile APA (7a Edizione)

De Guzman, M. O. Model letters for all occasions, and Sentence stress and emphasis. G.O.T. Publishers.

Citazione stile Chigago Style (17a edizione)

De Guzman, Maria Odulio. Model Letters for All Occasions, and Sentence Stress and Emphasis. [Manila]: G.O.T. Publishers.

Citatione MLA (9a ed.)

De Guzman, Maria Odulio. Model Letters for All Occasions, and Sentence Stress and Emphasis. G.O.T. Publishers.