Willis, A. J. (1963). An example in quantity serving (4th ed. revised.). London: Crosby Lockwood.
Παραπομπή Chicago StyleWillis, Arthur J. An Example in Quantity Serving. 4th ed. revised. London: Crosby Lockwood, 1963.
Παραπομπή MLAWillis, Arthur J. An Example in Quantity Serving. 4th ed. revised. London: Crosby Lockwood, 1963.
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