APA

LaSalle J. P., Lefschetz S., . (1963). Stability by Liapunov's direct method. New York, NY [u.a.]: Academic Press.

Chicago

LaSalle Joseph P, Lefschetz Solomon, . 1963. Stability by Liapunov's direct method. New York, NY [u.a.]: Academic Press.

Harvard

LaSalle J. P., Lefschetz S., . (1963). Stability by Liapunov's direct method. New York, NY [u.a.]: Academic Press.

MLA

LaSalle Joseph P, Lefschetz Solomon, . Stability by Liapunov's direct method. New York, NY [u.a.]: Academic Press. 1963.