Humphrey, M., & Troester, R. R. (1989). Oral history interview with Mike Humphrey.
Lua i Stíl Chicago (17ú heag.)Humphrey, Mike, agus Rosalie Riegle Troester. Oral History Interview with Mike Humphrey. 1989.
Lua MLA (8ú heag.)Humphrey, Mike, agus Rosalie Riegle Troester. Oral History Interview with Mike Humphrey. 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.