APA
Tarone E., . (1988). Variation in interlanguage. London: Edward Arnold.
Chicago
Tarone Elaine, . 1988. Variation in interlanguage. London: Edward Arnold.
Harvard
Tarone E., . (1988). Variation in interlanguage. London: Edward Arnold.
MLA
Tarone Elaine, . Variation in interlanguage. London: Edward Arnold. 1988.