CONCERN, Inc. (Consultancy, Organization, Communications, Education & Research Network). (1992). Sangguniang kabataan primer: Book I-. Mary Jo Educational Supply.
Lua i Stíl Chicago (17ú heag.)CONCERN, Inc. (Consultancy, Organization, Communications, Education & Research Network). Sangguniang Kabataan Primer: Book I-. Manila: Mary Jo Educational Supply, 1992.
Lua MLA (9ú heag.)CONCERN, Inc. (Consultancy, Organization, Communications, Education & Research Network). Sangguniang Kabataan Primer: Book I-. Mary Jo Educational Supply, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.