Gaya APA
Jenkins, I., Schröder, R. (2013).
Sustainability in Tourism .
Springer Fachmedien Wiesbaden:
Springer Gabler.
Gaya MLA
Jenkins, Ian., Schröder, Roland.
"Sustainability in Tourism".
Springer Fachmedien Wiesbaden:
Springer Gabler,
2013.
E-Book.