APA (7th ed.) Citation

Lock, G. W. (1969). Sisal: Thirty years' sisal research in Tanzania (2nd ed.). Longmans.

Chicago Style (17th ed.) Citation

Lock, G. W. Sisal: Thirty Years' Sisal Research in Tanzania. 2nd ed. London: Longmans, 1969.

MLA (9th ed.) Citation

Lock, G. W. Sisal: Thirty Years' Sisal Research in Tanzania. 2nd ed. Longmans, 1969.