Παραπομπή σε μορφή APA (7η εκδ.)

Siegel, F. R. (2015). Countering 21st Century Social-Environmental Threats to Growing Global Populations. Springer International Publishing : Imprint: Springer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Siegel, Frederic R. Countering 21st Century Social-Environmental Threats to Growing Global Populations. Cham: Springer International Publishing : Imprint: Springer, 2015.

Παραπομπή σε μορφή MLA (8th εκδ.)

Siegel, Frederic R. Countering 21st Century Social-Environmental Threats to Growing Global Populations. Springer International Publishing : Imprint: Springer, 2015.