APA

Sjöberg J., Sjöberg O., . (1974). Working with copper, silver, and enamel. New York: Van Nostrand Reinhold Co.

Chicago

Sjöberg Jan, Sjöberg Ove, . 1974. Working with copper, silver, and enamel. New York: Van Nostrand Reinhold Co.

Harvard

Sjöberg J., Sjöberg O., . (1974). Working with copper, silver, and enamel. New York: Van Nostrand Reinhold Co.

MLA

Sjöberg Jan, Sjöberg Ove, . Working with copper, silver, and enamel. New York: Van Nostrand Reinhold Co. 1974.