Citazione Stile APA (7a Edizione)

Garrido, T. P. (1973). Supplementary teaching materials on pollution for use in high school science classes. s.n.].

Citazione stile Chigago Style (17a edizione)

Garrido, Teresa P. Supplementary Teaching Materials on Pollution for Use in High School Science Classes. [Quezon City: s.n.], 1973.

Citatione MLA (9a ed.)

Garrido, Teresa P. Supplementary Teaching Materials on Pollution for Use in High School Science Classes. s.n.], 1973.