IPI-Congress Vienna, Austria, & International Potash Institute. (1957). Potassium Symposium, 1957: 16 papers read at the fourth Congress of the International Potash Institute (4 sessions), Vienna 1957 = Potasio symposium, 1957. The Insitute.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)IPI-Congress Vienna, Austria, và International Potash Institute. Potassium Symposium, 1957: 16 Papers Read at the Fourth Congress of the International Potash Institute (4 Sessions), Vienna 1957 = Potasio Symposium, 1957. Berne, Switzerland: The Insitute, 1957.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)IPI-Congress Vienna, Austria, và International Potash Institute. Potassium Symposium, 1957: 16 Papers Read at the Fourth Congress of the International Potash Institute (4 Sessions), Vienna 1957 = Potasio Symposium, 1957. The Insitute, 1957.