Spence, R. (1993). Rick Spence's Clipper 5.2 power programmer's guide. Sybex.
Chicago Style (17th ed.) CitationSpence, Rick. Rick Spence's Clipper 5.2 Power Programmer's Guide. San Francisco: Sybex, 1993.
ציטוט MLASpence, Rick. Rick Spence's Clipper 5.2 Power Programmer's Guide. Sybex, 1993.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.