APA (7th ed.) Citation

Massó, P., & Holzberg, B. (2010). Ecological hotels. TeNeues.

Chicago Style (17th ed.) Citation

Massó, Patricia, and Bärbel Holzberg. Ecological Hotels. Kempen, Germany ; New York: TeNeues, 2010.

MLA (9th ed.) Citation

Massó, Patricia, and Bärbel Holzberg. Ecological Hotels. TeNeues, 2010.