Abbs, B., & Freebairn, I. (1980). Building Strategies: Strategies 2. Longman.
Chicago-čujuhus (17. p.)Abbs, Brian, juo Ingrid Freebairn. Building Strategies: Strategies 2. England: Longman, 1980.
MLA-čujuhus (9. p.)Abbs, Brian, juo Ingrid Freebairn. Building Strategies: Strategies 2. Longman, 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.