Epstein, B., & Epstein, S. (1960). The first book of measurement. Watts, F.
Lua i Stíl Chicago (17ú heag.)Epstein, Beryl, agus Sam Epstein. The First Book of Measurement. [S.l.]: Watts, F, 1960.
Lua MLA (9ú heag.)Epstein, Beryl, agus Sam Epstein. The First Book of Measurement. Watts, F, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.