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.
Warning: These citations may not always be 100% accurate.