Shoppell, R. W. Descriptive price-list of Shoppell's modern house designs. Co-operative Building Plan Association.
Chicago-viite (17. p.)Shoppell, R. W. Descriptive Price-list of Shoppell's Modern House Designs. New York: Co-operative Building Plan Association.
MLA-viite (8. p.)Shoppell, R. W. Descriptive Price-list of Shoppell's Modern House Designs. Co-operative Building Plan Association.
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