APA (7th ed.) Citation

Hill, R. N., Hoyt, M., & Hard, W. R. (1969). Vermont: A special world. Vermont life magazine.

Chicago Style (17th ed.) Citation

Hill, Ralph Nading, Murray Hoyt, and Walter R. Hard. Vermont: A Special World. Montpelier, Vt: Vermont life magazine, 1969.

MLA (9th ed.) Citation

Hill, Ralph Nading, et al. Vermont: A Special World. Vermont life magazine, 1969.