APA-referens (7:e uppl.)

Valverde, J. C., Guevara-Bonilla, M., Arias, D., Briceño, E., & Esquivel, E. (2017). Effects of tillage activities on leaf area index in a Tectona grandis plantation in northern Costa Rica. Instituto de Ecología, A.C.

Chicago-referens (17:e uppl.)

Valverde, Juan Carlos, Mario Guevara-Bonilla, Dagoberto Arias, Elemer Briceño, och Edwin Esquivel. Effects of Tillage Activities on Leaf Area Index in a Tectona Grandis Plantation in Northern Costa Rica. Instituto de Ecología, A.C, 2017.

MLA-referens (9:e uppl.)

Valverde, Juan Carlos, et al. Effects of Tillage Activities on Leaf Area Index in a Tectona Grandis Plantation in Northern Costa Rica. Instituto de Ecología, A.C, 2017.