APA (7th ed.) Citation

Roland Holst, R. N. In memoriam Albert Hahn.

Chicago Style (17th ed.) Citation

Roland Holst, Richard Nicolaüs. In Memoriam Albert Hahn.

MLA (8th ed.) Citation

Roland Holst, Richard Nicolaüs. In Memoriam Albert Hahn.

Warning: These citations may not always be 100% accurate.