Παραπομπή σε μορφή APA (7η εκδ.)

Leffelaar, P. (1993). On systems analysis and simulation of ecological processes: With examples in CSMP and FORTRAN. Kluwer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Leffelaar, P.A. On Systems Analysis and Simulation of Ecological Processes: With Examples in CSMP and FORTRAN. Dordrecht: Kluwer, 1993.

Παραπομπή σε μορφή MLA (9th εκδ.)

Leffelaar, P.A. On Systems Analysis and Simulation of Ecological Processes: With Examples in CSMP and FORTRAN. Kluwer, 1993.