APA (7th ed.) Citation

Perrin, P. G. (1968). Writer's guide and index to english. (4a. ed.). Scott, Foresman and company.

Chicago Style (17th ed.) Citation

Perrin, Poter G. Writer's Guide and Index to English. 4a. ed. Estados Unidos: Scott, Foresman and company, 1968.

MLA (9th ed.) Citation

Perrin, Poter G. Writer's Guide and Index to English. 4a. ed. Scott, Foresman and company, 1968.