APA (7th ed.) Citation

De Silva, S. F. (1948). World geography for the S.S.C. The Colombo Apothecaries.

Chicago Style (17th ed.) Citation

De Silva, S. F. World Geography for the S.S.C. Colombo: The Colombo Apothecaries, 1948.

MLA (9th ed.) Citation

De Silva, S. F. World Geography for the S.S.C. The Colombo Apothecaries, 1948.

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