APA (7th ed.) Citation

Rönning, N. N. (1938). Fifty years in America. The Friend publishing company.

Chicago Style (17th ed.) Citation

Rönning, N. N. Fifty Years in America. Minneapolis, Minn.: The Friend publishing company, 1938.

MLA (9th ed.) Citation

Rönning, N. N. Fifty Years in America. The Friend publishing company, 1938.