Budhi, J. (1967). Pedoman Teknik Operasi"OPTEK". Airlangga University Press.
芝加哥风格引文Budhi, Julianto. Pedoman Teknik Operasi"OPTEK". Airlangga University Press, 1967.
MLA引文Budhi, Julianto. Pedoman Teknik Operasi"OPTEK". Airlangga University Press, 1967.
警告：这些引文格式不一定是100％准确.