St. Procopius College (Lisle, Ill.). (1960). [Observatory of St. Procopius College]. St. Procopius College.
Chicago Style (17th ed.) CitationSt. Procopius College (Lisle, Ill.). [Observatory of St. Procopius College]. [Lisle, Ill.]: St. Procopius College, 1960.
MLA citiranjeSt. Procopius College (Lisle, Ill.). [Observatory of St. Procopius College]. St. Procopius College, 1960.
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