APA (7th ed.) Citation

Thayer, S. P., Barnes, C. J., & Ballard, H. H. (2004). New National First Reader. Project Gutenberg.

Chicago Style (17th ed.) Citation

Thayer, S. Proctor, Charles J. Barnes, and Harlan Hoge Ballard. New National First Reader. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Thayer, S. Proctor, et al. New National First Reader. Project Gutenberg, 2004.

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