APA (7th ed.) Citation

Shaffer, D. E. (1981). Educator's Sourcebook of Posters--Mostly Free--for Teachers and Librarians. 3rd Edition.

Chicago Style (17th ed.) Citation

Shaffer, Dale E. Educator's Sourcebook of Posters--Mostly Free--for Teachers and Librarians. 3rd Edition. 1981.

MLA (9th ed.) Citation

Shaffer, Dale E. Educator's Sourcebook of Posters--Mostly Free--for Teachers and Librarians. 3rd Edition. 1981.

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