APA (7th ed.) Citation

Sloan, L. C., & Barron, E. J. (1990). “Equable” climates during earth history? Geology, 18, 489. https://doi.org/10.1130/0091-7613(1990)018<0489:ECDEH>2.3.CO;2

Chicago Style (17th ed.) Citation

Sloan, L. Cirbus, and Eric J. Barron. "“Equable” Climates During Earth History?" Geology 18 (1990): 489. https://doi.org/10.1130/0091-7613(1990)018<0489:ECDEH>2.3.CO;2.

MLA (9th ed.) Citation

Sloan, L. Cirbus, and Eric J. Barron. "“Equable” Climates During Earth History?" Geology, vol. 18, 1990, p. 489, https://doi.org/10.1130/0091-7613(1990)018<0489:ECDEH>2.3.CO;2.

Warning: These citations may not always be 100% accurate.