APA aipamena

MILL, R. C. (1990). Tourism The International Business Robert Christie Mill. Prentice-Hall.

Chicago Style aipamena

MILL, Robert Christie. Tourism The International Business Robert Christie Mill. Prentice-Hall, 1990.

MLA aipamena

MILL, Robert Christie. Tourism The International Business Robert Christie Mill. Prentice-Hall, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.