Locher, J. L., & Boyle, M. (1978). Mark Boyle's journey to the surface of the earth: J.L. Locher. Mayer.
Lua i Stíl Chicago (17ú heag.)Locher, Johannes L., agus Mark Boyle. Mark Boyle's Journey to the Surface of the Earth: J.L. Locher. Stuttgart [u.a.]: Mayer, 1978.
Lua MLA (8ú heag.)Locher, Johannes L., agus Mark Boyle. Mark Boyle's Journey to the Surface of the Earth: J.L. Locher. Mayer, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.