Não informado. (1990). New Directions for Adult and Continuing Education. Jessey Bass Publishers.
Citação do estilo Chicago (17ª ed.)Não informado. New Directions for Adult and Continuing Education. San Francisco, Calif: Jessey Bass Publishers, 1990.
Citação MLA (8ª ed.)Não informado. New Directions for Adult and Continuing Education. Jessey Bass Publishers, 1990.
警告：这些引文格式不一定是100％准确.