APA (7th ed.) Citation

St. Procopius College (Lisle, Ill.). (1960). [Observatory of St. Procopius College]. St. Procopius College.

Chicago Style (17th ed.) Citation

St. Procopius College (Lisle, Ill.). [Observatory of St. Procopius College]. [Lisle, Ill.]: St. Procopius College, 1960.

MLA (8th ed.) Citation

St. Procopius College (Lisle, Ill.). [Observatory of St. Procopius College]. St. Procopius College, 1960.