Sandberg, J. (1991). Competence as intentional achievement: A phenomenographic study. RMIT, ERADU, Educational Research and Development Unit.
芝加哥风格引文Sandberg, Jörgen. Competence as Intentional Achievement: A Phenomenographic Study. Melbourne: RMIT, ERADU, Educational Research and Development Unit, 1991.
MLA引文Sandberg, Jörgen. Competence as Intentional Achievement: A Phenomenographic Study. RMIT, ERADU, Educational Research and Development Unit, 1991.
警告：这些引文格式不一定是100％准确.