Final answer:
Green leafy vegetables, broccoli, canned sardines, intact salmon, nuts, beans, seeds, and shellfish.
Step-by-step explanation:
If a person does not consume dairy products, there are several useful sources of calcium that can be incorporated into their diet. Green leafy vegetables, such as kale and spinach, are rich in calcium. Broccoli, canned sardines with their soft bones, and intact salmon are also good sources. Additionally, nuts, beans, seeds, and shellfish provide smaller amounts of calcium.