APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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