APA Citatie

Kass, D., Kauffman, J., & Herrera Reyes, C. (1995). Costa Rica: Reference soils of the Turrialba valley and slopes of the Irazú volcano. Soil brief Costa Rica 2.

Chicago Style citaat

Kass, D.C.L., J.H Kauffman, en C.G Herrera Reyes. Costa Rica: Reference Soils of the Turrialba Valley and Slopes of the Irazú Volcano. Soil Brief Costa Rica 2. 1995.

MLA citatie

Kass, D.C.L., J.H Kauffman, en C.G Herrera Reyes. Costa Rica: Reference Soils of the Turrialba Valley and Slopes of the Irazú Volcano. Soil Brief Costa Rica 2. 1995.