Costello, R. (1991). Ranch Potpourri (1–). https://oaks.kent.edu/node/8916
Costello, Robert. 1991. “Ranch Potpourri”. https://oaks.kent.edu/node/8916.
Costello, Robert. Ranch Potpourri. 1 Jan. 1991, https://oaks.kent.edu/node/8916.