Training in Technology. (1999). Experiments with the Four Quadrant Drive. Berg bei Ravensburg: System Technik.
शिकागो स्टाइल उद्धरणTraining in Technology. Experiments With the Four Quadrant Drive. Berg bei Ravensburg: System Technik, 1999.
एमएलए उद्धरणTraining in Technology. Experiments With the Four Quadrant Drive. Berg bei Ravensburg: System Technik, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.