APA (7th ed.) Citation
OLK, CASSMAN, MAHIEU, & RANDALL. (1998). Conserved chemical properties of young humic acid fractions in tropical lowland soil under intensive irrigated rice cropping. Wiley.
Chicago Style (17th ed.) Citation
OLK, CASSMAN, MAHIEU, and RANDALL. Conserved Chemical Properties of Young Humic Acid Fractions in Tropical Lowland Soil Under Intensive Irrigated Rice Cropping. Wiley, 1998.
MLA (9th ed.) Citation
OLK, et al. Conserved Chemical Properties of Young Humic Acid Fractions in Tropical Lowland Soil Under Intensive Irrigated Rice Cropping. Wiley, 1998.
Warning: These citations may not always be 100% accurate.