McClanahan, S. D., & Amstutz, D. D. (1988). Steck-Vaughn GED writing skills: Mechanics, usage, sentence structure. Steck-Vaughn Co..
Citazione stile Chigago Style (17a edizione)McClanahan, Susan D., e Donna D. Amstutz. Steck-Vaughn GED Writing Skills: Mechanics, Usage, Sentence Structure. Austin, TX: Steck-Vaughn Co., 1988.
Citatione MLA (8a ed.)McClanahan, Susan D., e Donna D. Amstutz. Steck-Vaughn GED Writing Skills: Mechanics, Usage, Sentence Structure. Steck-Vaughn Co., 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.