Citazione Stile APA (7a Edizione)

Ruprecht, T. K. (1973). Fertility control and per capita income in the Philippines: Some approximations. s.n.

Citazione stile Chigago Style (17a edizione)

Ruprecht, Theodore K. Fertility Control and Per Capita Income in the Philippines: Some Approximations. [S.l: s.n, 1973.

Citatione MLA (9a ed.)

Ruprecht, Theodore K. Fertility Control and Per Capita Income in the Philippines: Some Approximations. s.n, 1973.