Queen, E. (1961). Ellery Queen's 15th mystery annual: The year's best from Ellery Queen's mystery magazine. Gollancz.
Chicago-viite (17. p.)Queen, Ellery. Ellery Queen's 15th Mystery Annual: The Year's Best from Ellery Queen's Mystery Magazine. London: Gollancz, 1961.
MLA-viite (8. p.)Queen, Ellery. Ellery Queen's 15th Mystery Annual: The Year's Best from Ellery Queen's Mystery Magazine. Gollancz, 1961.
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