Παραπομπή σε μορφή APA (7η εκδ.)

Zuluaga, A. L. H. (2013). Effects of green tourism on the occupancy level of the Little Surfmaid Hotel in San Juan, La Union. University of the Philippines, Asia Institute of Tourism.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Zuluaga, Alexandra Louise H. Effects of Green Tourism on the Occupancy Level of the Little Surfmaid Hotel in San Juan, La Union. Quezon City: University of the Philippines, Asia Institute of Tourism, 2013.

Παραπομπή σε μορφή MLA (9th εκδ.)

Zuluaga, Alexandra Louise H. Effects of Green Tourism on the Occupancy Level of the Little Surfmaid Hotel in San Juan, La Union. University of the Philippines, Asia Institute of Tourism, 2013.