APA (7th ed.) Citation

Crawford, E. W. (1980). A programming-simulation study of constraints affecting the long-run income-earning ability of traditional dryland farming systems in Northern Nigeria. [publisher not identified].

Chicago Style (17th ed.) Citation

Crawford, Eric W. A Programming-simulation Study of Constraints Affecting the Long-run Income-earning Ability of Traditional Dryland Farming Systems in Northern Nigeria. [Place of publication not identified]: [publisher not identified], 1980.

MLA (9th ed.) Citation

Crawford, Eric W. A Programming-simulation Study of Constraints Affecting the Long-run Income-earning Ability of Traditional Dryland Farming Systems in Northern Nigeria. [publisher not identified], 1980.