APA

Barth J. ،. S., .Hospitality Law. Canda : Wiley،2005: .

Chicago

Barth J.D ، Stephen, .Hospitality Law. Canda : Wiley،2005: .

Harvard

Barth J. ،. S., .Hospitality Law. Canda : Wiley،2005: .

MLA

Barth J.D ، Stephen, .Canda : Wiley،2005: . .