- Author: Miles Matthew B., Saldaña Johnny, Huberman A. M
- Language: English
- Year: 2014
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- Language: English
- Year: 2005
- Author: Luckerhoff Jason, Guillemette François
- Language: French
- Year: 2012
- Author: Bogdan Robert, Biklen Sari Knopp
- Language: English
- Year: 2007