Shaffer, D. E. (1984). Sourcebook of Teaching Aids...Mostly Free. Posters & Pamphlets for Educators. 4th Edition.
Style de citation Chicago (17e éd.)Shaffer, Dale E. Sourcebook of Teaching Aids...Mostly Free. Posters & Pamphlets for Educators. 4th Edition. 1984.
Style de citation MLA (9e éd.)Shaffer, Dale E. Sourcebook of Teaching Aids...Mostly Free. Posters & Pamphlets for Educators. 4th Edition. 1984.
Attention : ces citations peuvent ne pas être correctes à 100%.