Leifeste, A., & Stiefel, B. (2018). Sustainable heritage: Merging environmental conservation and historic preservation. Routledge.
Chicago-viite (17. p.)Leifeste, Amalia, ja Barry Stiefel. Sustainable Heritage: Merging Environmental Conservation and Historic Preservation. New York: Routledge, 2018.
MLA-viite (9. p.)Leifeste, Amalia, ja Barry Stiefel. Sustainable Heritage: Merging Environmental Conservation and Historic Preservation. Routledge, 2018.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.