Citazione Stile APA (7a Edizione)

(1939). General tests, United States civil service; a complete and authoritative course of examination type questions and answers.

Citazione stile Chigago Style (17a edizione)

General Tests, United States Civil Service; a Complete and Authoritative Course of Examination Type Questions and Answers. 1939.

Citatione MLA (9a ed.)

General Tests, United States Civil Service; a Complete and Authoritative Course of Examination Type Questions and Answers. 1939.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.