APA
Wills, Tropical Products Institute, . (1972). Evaluation of the produce flow sampler for sampling unshelled ground nuts, yellow maize and soft wheat. London: Tropical Products Institute.
Chicago
Wills, Tropical Products Institute, . 1972. Evaluation of the produce flow sampler for sampling unshelled ground nuts, yellow maize and soft wheat. London: Tropical Products Institute.
Harvard
Wills, Tropical Products Institute, . (1972). Evaluation of the produce flow sampler for sampling unshelled ground nuts, yellow maize and soft wheat. London: Tropical Products Institute.
MLA
Wills, Tropical Products Institute, . Evaluation of the produce flow sampler for sampling unshelled ground nuts, yellow maize and soft wheat. London: Tropical Products Institute. 1972.
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