APA استشهاد

Middleton, V. T., & Clarke, J. (2007). Marketing in travel and tourism. Elsevier.

استشهاد بنمط شيكاغو

Middleton, Victor T.C, و Jackie Clarke. Marketing in Travel and Tourism. Amsterdam: Elsevier, 2007.

MLA استشهاد

Middleton, Victor T.C, و Jackie Clarke. Marketing in Travel and Tourism. Elsevier, 2007.