Cita APA (7a ed.)
Scher, D. Exploring Conic Sections with The Geometer's Sketchpad. Key Curriculum Press.
Cita estilo Chicago (17a ed.)
Scher, Daniel. Exploring Conic Sections with The Geometer's Sketchpad. Emeryville, EUA: Key Curriculum Press.
Cita MLA (9a ed.)
Scher, Daniel. Exploring Conic Sections with The Geometer's Sketchpad. Key Curriculum Press.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.