Ackland, D., & Freeburg, J. (1989). Insight guides: Texas /Diana Ackland and Jamie Freeburg. APA Pub.
Lua i Stíl Chicago (17ú heag.)Ackland, Diana, agus Jamie Freeburg. Insight Guides: Texas /Diana Ackland and Jamie Freeburg. Singapore: APA Pub, 1989.
Lua MLA (9ú heag.)Ackland, Diana, agus Jamie Freeburg. Insight Guides: Texas /Diana Ackland and Jamie Freeburg. APA Pub, 1989.
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