MLA

Hallman, William K, et al. Americans and Gm Food: Knowledge, Opinion and Interest In 2004. USA, 2004.

APA

Hallman, W. K, Hebden, W. Carl, Cuite, C. L, Aquino, H. L, & Lang, J. T. (2004). Americans and GM food: knowledge, opinion and interest in 2004. USA.

Chicago

Hallman, William K., W. Carl Hebden, Cara L Cuite, Helen L Aquino, and John T Lang. Americans and GM Food: Knowledge, Opinion and Interest In 2004. USA, 2004.