Παραπομπή APA

Vernon, P. E. (1971). Certificate of secondary education: Introduction to objective type examination.

Παραπομπή Chicago Style

Vernon, Philip E. Certificate of Secondary Education: Introduction to Objective Type Examination. 1971.

Παραπομπή MLA

Vernon, Philip E. Certificate of Secondary Education: Introduction to Objective Type Examination. 1971.

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