APA (7th ed.) Citation

Hamilton, R. I., Hope, H. J., McElroy, A., & Smith, D. Sources of cold tolerance ; R. I. Hamilton, H. J. Hope, A. McElroy, D. Smith.

Chicago Style (17th ed.) Citation

Hamilton, R. I., H. J. Hope, A. McElroy, and D. Smith. Sources of Cold Tolerance ; R. I. Hamilton, H. J. Hope, A. McElroy, D. Smith.

MLA (9th ed.) Citation

Hamilton, R. I., et al. Sources of Cold Tolerance ; R. I. Hamilton, H. J. Hope, A. McElroy, D. Smith.