APA (7th ed.) Citation

Italiaander, R. Some unknown letters of the German Africa explorer Heinrich Barth.

Chicago Style (17th ed.) Citation

Italiaander, Rolf. Some Unknown Letters of the German Africa Explorer Heinrich Barth.

MLA (8th ed.) Citation

Italiaander, Rolf. Some Unknown Letters of the German Africa Explorer Heinrich Barth.

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