Gaya APA

Lehmann, W., Malkiel, Y. (1968). Directions for Historical Linguistics: A Symposium (1). : University of Texas Press.

Gaya MLA

Lehmann, W.P.., Malkiel, Yakov. "Directions for Historical Linguistics: A Symposium". 1 : University of Texas Press, 1968. Buku Teks.