APA (7th ed.) Citation

De Alwis, L. (1969). The national parks of Ceylon. Government Printers.

Chicago Style (17th ed.) Citation

De Alwis, Lyn. The National Parks of Ceylon. Colombo: Government Printers, 1969.

MLA (9th ed.) Citation

De Alwis, Lyn. The National Parks of Ceylon. Government Printers, 1969.

Warning: These citations may not always be 100% accurate.