Dyfyniad APA

Koch, R. S., & Rachel Spack Koch; Keith S Folse. (2006). Focus on grammar: An integrated skills approach. White Plains: Longman, cop.

Dyfyniad Arddull Chicago

Koch, Rachel Spack, và Rachel Spack Koch; Keith S Folse. Focus On Grammar: An Integrated Skills Approach. White Plains: Longman, cop, 2006.

Dyfyniad MLA

Koch, Rachel Spack, và Rachel Spack Koch; Keith S Folse. Focus On Grammar: An Integrated Skills Approach. White Plains: Longman, cop, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.