APA引文

Tan, E. A. (1971). The level of unemployment in the Philippines. s.n.].

Chicago Style (17th ed.) Citation

Tan, Edita Abella. The Level of Unemployment in the Philippines. [Quezon City: s.n.], 1971.

MLA引文

Tan, Edita Abella. The Level of Unemployment in the Philippines. s.n.], 1971.