Penn, W. (1854). A key opening the way to every capacity. for sale at Friends' Bookstore.
Citace podle Chicago (17th ed.)Penn, William. A Key Opening the Way to Every Capacity. Philadelphia: for sale at Friends' Bookstore, 1854.
Citace podle MLA (8th ed.)Penn, William. A Key Opening the Way to Every Capacity. for sale at Friends' Bookstore, 1854.
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