Παραπομπή σε μορφή APA (7η εκδ.)

Rolfe, C., Michaelowa, A., & Dutschke, M. (1999). Closing the Gap: A Comparison of Approaches to Encourage Early Greenhouse Gas Emission Reductions.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Rolfe, Chris, Axel Michaelowa, και Michael Dutschke. Closing the Gap: A Comparison of Approaches to Encourage Early Greenhouse Gas Emission Reductions. Hamburg, 1999.

Παραπομπή σε μορφή MLA (8th εκδ.)

Rolfe, Chris, et al. Closing the Gap: A Comparison of Approaches to Encourage Early Greenhouse Gas Emission Reductions. 1999.