Phillips, E. A. G., & Kidd, C. A. (1927). English step by step .. Ginn and Co.
Lua i Stíl Chicago (17ú heag.)Phillips, Ellen A. G., agus Cecil A. Kidd. English Step by Step .. Boston, New York [etc.]: Ginn and Co, 1927.
Lua MLA (8ú heag.)Phillips, Ellen A. G., agus Cecil A. Kidd. English Step by Step .. Ginn and Co, 1927.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.