Tull, D. S. (1973). SURVEY research: A decisional approach / D. S. Tull [and] Gerald S. Albaum. Intext Educational Pub.
Lua i Stíl Chicago (17ú heag.)Tull, Donald S. SURVEY Research: A Decisional Approach / D. S. Tull [and] Gerald S. Albaum. New York: Intext Educational Pub, 1973.
Lua MLA (9ú heag.)Tull, Donald S. SURVEY Research: A Decisional Approach / D. S. Tull [and] Gerald S. Albaum. Intext Educational Pub, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.