एपीए उद्धरण

Eckham, W. (1973). Matched asymptotic expansions and singular perturbation. Amsterdam.

शिकागो स्टाइल उद्धरण

Eckham, Wiktor. Matched Asymptotic Expansions and Singular Perturbation. Amsterdam, 1973.

एमएलए उद्धरण

Eckham, Wiktor. Matched Asymptotic Expansions and Singular Perturbation. Amsterdam, 1973.