Books and monographs •
Die Rechtsbeugungsverbrechen des Deutschen Reichsstrafgesetzbuches (1886) •
Die Nebenklage im deutschen Strafprozess (1889) •
Zur Lehre von der Untersuchungshaft (1889) •
Die Objekte des Verbrechens (1894) •
Das Gewissen (1898) •
International Law: volume I,
Peace (1905; second edition, 1912), volume II,
War and Neutrality, (1906; second edition, 1912) •
International Incidents (Cambridge University Press 1909); second edition, 1911) • (in German, 1911) • Lassa Oppenheim,
Ronald Roxburgh, et al.,
International Law: A Treatise (two volumes, 1918) • •
Other works •
The Science of International Law: Its Task and Method, American Journal of International Law, vol. ii, pp. 313–56 (1908)
Edited by Oppenheim • The Collected Papers of
John Westlake on Public International Law (Cambridge University Press 1914) • Co-editor, Zeitschrift für Völkerrecht, Vols. i–viii (1906–14) • Contributions to International Law and Diplomacy (Longmans, Green and Co.) ==References==