Stuck at crystal's load capacity
From the datasheet it looks like the LA1185 is intended to be used with a parallel resonant LC. There doesn't seem to be any data indicating the capacitance at the pin.
To use it with a crystal I would suggest using the same circuit but replace the LC circuit with the crystal. Leave the 30pF capacitor in place, or possibly reduce it to 22pF.
Most, but not all, parallel resonant crystals are intended for use with 20pF shunt capacitance. If the capacitance is not the same as the intended value the crystal will oscillate at a slightly different frequency.
Alternatively you could create your own oscillator and directly inject the output of the oscillator into pin 8 on the LA1185. Some experimentation will be needed to determine the correct injection voltage.
Pin 7 is described as &quot;Local Osc Monitor&quot; on some data sheets so presumably you could look at the signal there to determine that the signal had been injected correctly.