Petavel , J. W. (1921). Non co- operation and the bread problem : the first lecture of a series delivers to Calcutta: Calcutta University. Calcutta univ. pr.
Chicago-čujuhus (17. p.)Petavel , J W. Non Co- Operation and the Bread Problem : The First Lecture of a Series Delivers to Calcutta: Calcutta University. Calcutta: Calcutta univ. pr, 1921.
MLA-čujuhus (9. p.)Petavel , J W. Non Co- Operation and the Bread Problem : The First Lecture of a Series Delivers to Calcutta: Calcutta University. Calcutta univ. pr, 1921.
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