Παραπομπή σε μορφή APA (7η εκδ.)

Parker, H. (1887). Report on the Per-Aru Valley: Irrigation in the Northern Province, Mullaittivu District. George J.A. Skeen, Govt. Printer, Ceylon.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Parker, Henry. Report on the Per-Aru Valley: Irrigation in the Northern Province, Mullaittivu District. Colombo: George J.A. Skeen, Govt. Printer, Ceylon, 1887.

Παραπομπή σε μορφή MLA (8th εκδ.)

Parker, Henry. Report on the Per-Aru Valley: Irrigation in the Northern Province, Mullaittivu District. George J.A. Skeen, Govt. Printer, Ceylon, 1887.