The Practice of Social Research. Wadsworth Cengage Learning.
शिकागो स्टाइल उद्धरणThe Practice of Social Research. Wadsworth Cengage Learning.
एमएलए उद्धरणThe Practice of Social Research. Wadsworth Cengage Learning.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.