APA (7th ed.) Citation

Pfefferkorn, W. Preface. Institut de Géographie Alpine.

Chicago Style (17th ed.) Citation

Pfefferkorn, Wolfgang. Preface. Institut de Géographie Alpine.

MLA (9th ed.) Citation

Pfefferkorn, Wolfgang. Preface. Institut de Géographie Alpine.

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