Lua APA (7ú heag.)

(1990). Subjects in space. Routledge.

Lua i Stíl Chicago (17ú heag.)

Subjects in Space. London: Routledge, 1990.

Lua MLA (8ú heag.)

Subjects in Space. Routledge, 1990.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.