Chase's, E. o. (2019). Chase's calendar of events 2020: The ultimate go-to guide for special days, weeks and months (63rd edition.). Bernan press.
Chicago-viite (17. p.)Chase's, Editors of. Chase's Calendar of Events 2020: The Ultimate Go-to Guide for Special Days, Weeks and Months. 63rd edition. Lanham: Bernan press, 2019.
MLA-viite (9. p.)Chase's, Editors of. Chase's Calendar of Events 2020: The Ultimate Go-to Guide for Special Days, Weeks and Months. 63rd edition. Bernan press, 2019.
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