APA

Pennsylvania State University C. o. A. A. E. S., . (1970). Bulletin Pennsylvania University. Pennsylvania: Pennsylvania State University, College of Agriculture, Agricultural Experiment Station.

Chicago

Pennsylvania State University College of Agriculture Agricultural Experiment Station, . 1970. Bulletin Pennsylvania University. Pennsylvania: Pennsylvania State University, College of Agriculture, Agricultural Experiment Station.

Harvard

Pennsylvania State University C. o. A. A. E. S., . (1970). Bulletin Pennsylvania University. Pennsylvania: Pennsylvania State University, College of Agriculture, Agricultural Experiment Station.

MLA

Pennsylvania State University College of Agriculture Agricultural Experiment Station, . Bulletin Pennsylvania University. Pennsylvania: Pennsylvania State University, College of Agriculture, Agricultural Experiment Station. 1970.