APA način citiranja (7. izdanje)
Westfall, J. v. E. (1899). On a Category of transformation groups in three and four dimensions.
Čikaški stil citiranja (17. izdanje)
Westfall, John van Etten. On a Category of Transformation Groups in Three and Four Dimensions. Leipzig, 1899.
MLA način citiranja (9. izdanje)
Westfall, John van Etten. On a Category of Transformation Groups in Three and Four Dimensions. 1899.
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