Cita APA (7a ed.)

Hedrick, U. P., Howe, G. H., Taylor, O. M., Francis, E. H., & Tukey, H. B. (1921). The pears of New York: Report of the New York Agricultural Experiment Station for the year 1921. J. B. Lyon.

Cita Chicago Style (17a ed.)

Hedrick, U. P., G. H. Howe, O. M. Taylor, E. H. Francis, y Harold Bradford Tukey. The Pears of New York: Report of the New York Agricultural Experiment Station for the Year 1921. Albany: J. B. Lyon, 1921.

Cita MLA (8a ed.)

Hedrick, U. P., et al. The Pears of New York: Report of the New York Agricultural Experiment Station for the Year 1921. J. B. Lyon, 1921.