Citazione APA

Horn, S. P., & Rodgers, J. C. (1996). The northern limit of Alnus (Fagales) in Costa Rica: Modern pollen evidence of a possible range extension.

Stile di citazione Chicago

Horn, Sally P., e John C. Rodgers. The Northern Limit of Alnus (Fagales) in Costa Rica: Modern Pollen Evidence of a Possible Range Extension. 1996.

Citazione MLA

Horn, Sally P., e John C. Rodgers. The Northern Limit of Alnus (Fagales) in Costa Rica: Modern Pollen Evidence of a Possible Range Extension. 1996.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.