Gerhardt, K. (1994). Seedling development of four tree species in secondary tropical dry forest in Guanacaste, Costa Rica. Acta Universitatis Upsaliensis ; Distributor, Almqvist & Wiksell International.
Čikaški stil citiranja (17. izdanje)Gerhardt, Karin. Seedling Development of Four Tree Species in Secondary Tropical Dry Forest in Guanacaste, Costa Rica. Uppsala : Stockholm: Acta Universitatis Upsaliensis ; Distributor, Almqvist & Wiksell International, 1994.
MLA način citiranja (8. izdanje)Gerhardt, Karin. Seedling Development of Four Tree Species in Secondary Tropical Dry Forest in Guanacaste, Costa Rica. Acta Universitatis Upsaliensis ; Distributor, Almqvist & Wiksell International, 1994.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.