APA-viite

Swidler, E. The recurring dark ages : Ecological stress, climate changes, and system transformation: Book review.

Chicago-tyylinen lähdeviittaus

Swidler, Eva-Maria. The Recurring Dark Ages : Ecological Stress, Climate Changes, and System Transformation: Book Review.

MLA-viite

Swidler, Eva-Maria. The Recurring Dark Ages : Ecological Stress, Climate Changes, and System Transformation: Book Review.

Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.