DeVries, V. H., & Roe, G. R. (1967). Semivowels in the Coyono alphabet. Bureau of Printing.
Lua i Stíl Chicago (17ú heag.)DeVries, Virginia H., agus G. Richard Roe. Semivowels in the Coyono Alphabet. Manila: Bureau of Printing, 1967.
Lua MLA (9ú heag.)DeVries, Virginia H., agus G. Richard Roe. Semivowels in the Coyono Alphabet. Bureau of Printing, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.