Citazione Stile APA (7a Edizione)

Barnachea, C. P. (1972). A study of the land productivity of Nueva Ecija and its implications for science teaching in the Central Luzon Polytechnic College. s.n.].

Citazione stile Chigago Style (17a edizione)

Barnachea, Cosme P. A Study of the Land Productivity of Nueva Ecija and Its Implications for Science Teaching in the Central Luzon Polytechnic College. [Quezon City: s.n.], 1972.

Citatione MLA (9a ed.)

Barnachea, Cosme P. A Study of the Land Productivity of Nueva Ecija and Its Implications for Science Teaching in the Central Luzon Polytechnic College. s.n.], 1972.