APA (7th ed.) Citation

Theng, B. K. G. (1980). Soils with variable charge. New Zealand Society of Soil Science.

Chicago Style (17th ed.) Citation

Theng, B. K. G. Soils with Variable Charge. Lower Hutt, [N.Z.]: New Zealand Society of Soil Science, 1980.

MLA (9th ed.) Citation

Theng, B. K. G. Soils with Variable Charge. New Zealand Society of Soil Science, 1980.