APA (7th ed.) Citation

Kvenvolden, K. A., & Cooper, C. K. (2003). Natural seepage of crude oil into the marine environment. Geo-Marine Letters, 23(3/4), 140. https://doi.org/10.1007/s00367-003-0135-0

Chicago Style (17th ed.) Citation

Kvenvolden, K. A., and C. K. Cooper. "Natural Seepage of Crude Oil into the Marine Environment." Geo-Marine Letters 23, no. 3/4 (2003): 140. https://doi.org/10.1007/s00367-003-0135-0.

MLA (9th ed.) Citation

Kvenvolden, K. A., and C. K. Cooper. "Natural Seepage of Crude Oil into the Marine Environment." Geo-Marine Letters, vol. 23, no. 3/4, 2003, p. 140, https://doi.org/10.1007/s00367-003-0135-0.