APA (7th ed.) Citation

Williams, D., Simpson, I., & Bier, H. (1986). Properties of New Zealand-grown poplar.

Chicago Style (17th ed.) Citation

Williams, David, Ian Simpson, and Hank Bier. Properties of New Zealand-grown Poplar. Rotorua, 1986.

MLA (9th ed.) Citation

Williams, David, et al. Properties of New Zealand-grown Poplar. 1986.